Zork: The Undiscovered Underground ( or ZUU for short ) is an interactive fiction video game written by former Infocom Implementors Marc Blank and Michael Berlyn and implemented by G. Kevin Wilson using the Inform language.

This is a reference to Satan, since Infocom frequently made metafictional references to the " Implementors " as the creator-gods of the Zork setting, " Implementor " being the preferred in-house term for a game designer.

The player, sent to retrieve the Coconut of Quendor from the Implementors, arrives at the Implementors ' Luncheon on the Ethereal Plane of Atrii only to find he has been followed by the Ur-grue in shadow form, who takes the opportunity to steal it for himself.

* ITU-T Implementors ' Guide for G. 722. 2

His persona as the progenitor of grues and creator of monsters may be linked to his role as the creator of the games ' challenges, Infocom having long made joking references to grues ' being the foremost example of the Implementors ' capricious, sometimes nonsensical design decisions.

Lebling and Blank each authored several more games and additional game writers ( or " Implementors ") were hired, notably including Steve Meretzky.

Soon, however, a task is bestowed by the Implementors, a group of godlike creatures jokingly based on Infocom's game designers.

Rumoured to be the spirits of fallen Implementors, Ur-Grues can surround themselves in a sphere of darkness that only sunlight can pierce.

The Ur-Grue character in Beyond Zork may be a reference to Brian Moriarty himself, the creator of the game, who is notably absent from the game's portrayal of an " Implementors ' Luncheon ", where each Implementor is recognizably based on a member of the Infocom staff.

Enthusiast computers ( often referred to as a " box ", " build ", or " rig " by their owners ) commonly feature extravagant cases and high-end components, and are sometimes liquid cooled.

Because of its abundance, granite was commonly used to build foundations for homes in New England.

It was not until the concluding months of 1943 that the only realized attempt to build a " true four engined " version of the A-series He 177, the He 177B emerged with only three airworthy prototypes produced by early 1944, some three years after the first flights of the Avro Lancaster prototypes, the most commonly encountered RAF bomber pounding Germany on strategic night raids from 1942 to the end of the war in Europe.

Estimates of the amount of effort required to build Maeshowe vary ; a commonly suggested number is 39, 000 man-hours, although Colin Renfrew calculated that at least 100, 000 hours would be required.

William Batty would also build his own 14, 000-person arena, known commonly as Batty's Hippodrome, in Kensington Gardens and draw crowds from the Crystal Palace Exhibition.

When bales are used to build or insulate buildings, the straw bales are commonly finished with earthen plaster.

Blimps are the most commonly built airships, because they are relatively easy to build and easy to transport once deflated.

Screenwriters consulting American works to build the character Tavington based on Tarleton would have commonly found descriptions of him as barbaric and accounts of his name being used for recruiting and motivation during the Revolutionary War itself, even if those accounts were fiction.

Other lexical preprocessors include the general-purpose m4, most commonly used in cross-platform build systems such as autoconf, and GEMA, an open source macro processor which operates on patterns of context.

In the next year the Metropolitan District Railway ( commonly known as the District railway ) was formed to build and operate a railway from South Kensington to Tower Hill.

The Tongva called them ti ' at and to build them, they used planks that were sewn together, edge to edge, and then caulked and coated with either pine pitch, or, more commonly, the tar that was available either from the La Brea Tar Pits, or as asphaltum that had washed up on shore from offshore oil seeps.

The script, when run, scans the build environment and generates a subordinate script which, in turn, converts other input files and most commonly into output files () which are appropriate for that build environment.

Before Make's introduction, the Unix build system most commonly consisted of operating system dependent " make " and " install " shell scripts accompanying their program's source.

Hans Lippershey ( 1570 – September 1619 ), also known as Johann Lippershey or Lipperhey, was a German-Dutch lensmaker commonly associated with the invention of the telescope, although it is unclear if he was the first to build one.

Patients are commonly put on oral prophylactic antibiotics to combat infections in the uretery tract and the kidneys but this can lead to tolerance of the antibiotic, so over time the patient can build up tolerance to a large number of oral antibiotics, leading to a need for IV ( intravenous ) antibiotics administered while the patient is an inpatient.

Many, but not all, make wafer-like doors to their burrows, while others build the cork-like doors found commonly in the true trapdoor spiders.

Megachilid genera are most commonly known as mason bees and leafcutter bees, reflecting the materials they build their nest cells from ( soil or leaves, respectively ); a few collect plant or animal hairs and fibers, and are called carder bees.

There is no standard for wide or narrow gauge model track, and modelers wishing to portray such railway track either build their own, or more commonly accept the shortcomings of appropriately wider or narrower gauge model track.

Since large helices are difficult to build and unwieldy to steer and aim, the design is commonly employed only at higher frequencies, ranging from VHF up to microwave.

The garbage collection jobs and scavenging professions are what allow urban populations to continue unhindered by outbreaks and disease most commonly brought by the build up of physical waste.

Their innate preferences for nest-building sites leads them to commonly build nests on human habitation, where they can be very unwelcome ; although generally not aggressive, they can be provoked into defending their nests.

Other projected products most commonly involve using nanosensors to build smaller integrated circuits, as well as incorporating them into various other commodities made using other forms of nanotechnology for use in a variety of situations including transportation, communication, improvements in structural integrity, and robotics.

Since spatial properties are reliable indicators of " location " in a spatial file manager, the user may build up a familiar work environment by arranging commonly used windows, secure in the knowledge that this state will be preserved and will always map to the expected locations.

The person using these tests must determine which combination of procedures is practical for any specific item in order to evaluate the dimensional changes of textile fabrics or garments after laundering procedures commonly used in the home or commercial laundry.

or, more commonly, using the absolute value, with

Dropping the tildes and using, we get the commonly used form of the acoustic momentum equation

The reason the digits are more commonly known as " Arabic numerals " in Europe and the Americas is that they were introduced to Europe in the 10th century by Arabs of North Africa, who were then using the digits from Libya to Morocco.

However, commonly there are delays in regulatory and legislative actions to limit the use of antibacterials, attributable partly to resistance against such regulation by industries using or selling antibacterials, and to the time required for research to test causal links between antibacterial use and resistance.

In the narrower sense environmental activists that align themselves with Earth First or Road Protestors would commonly be labelled activists, whilst a local community fighting to stop their park or green being sold off or built on would fit the broader application, due to their using similar means to similarly conservative ends.

The FreeBSD and OpenBSD operating system continue to use Berkeley DB 1. 8x for compatibility reasons ; Linux-based operating systems commonly include several versions to accommodate for applications still using older interfaces / files.

Ion exchange chromatography is commonly used to purify proteins using FPLC.

* Stabila-Tip – Cessna started commonly using wingtip fuel tanks, but carefully shaped for aerodynamic effect rather than just tubular-shaped.

Although they also employ humor, they are more serious in tone, commonly using irony or satire.

Fretboards are most commonly made of rosewood, ebony, maple, and sometimes manufactured using composite materials such as HPL or resin.

The Xerox Alto was the first to use a graphical user interface. In computing, a graphical user interface ( GUI, commonly pronounced gooey ) is a type of user interface that allows users to interact with electronic devices using images rather than text commands.

For local detail surveys, tacheometers are commonly employed although the old-fashioned rectangular technique using angle prism and steel tape is still an inexpensive alternative.

The most commonly known is the GNU Project's implementation using Lempel-Ziv coding ( LZ77 ).

The term " hydrofoil " is commonly used for the wing-like structure mounted on struts below the hull of a variety of boats ( see illustration ), which lifts the boat out of the water during forward motion, in order to reduce hull drag ; as such, the term " hydrofoil " is often used to refer to boats using hydrofoil technology.

( N. B., while hierarchies are commonly studied using graph theory, the general terminology used is different, and words such as " direct " may have different general meanings )

He was able to provide a qualitative explanation of linear and spherical wave propagation, and to derive the laws of reflection and refraction using this principle, but could not explain the deviations from rectilinear propagation which occur when light encounters edges, apertures and screens, commonly known as diffraction effects.

This is the approach commonly taken in introductory treatments of quantum mechanics, using the formalism of Schrödinger's wave mechanics.

In conjunction with an appropriate codec using MPEG or various manufacturers proprietary algorithms, an ISDN BRI can be used to send stereo bi-directional audio coded at 128 kbit / s with 20 Hz – 20 kHz audio bandwidth, although commonly the G. 722 algorithm is used with a single 64 kbit / s B channel to send much lower latency mono audio at the expense of audio quality.

Jazz guitarists commonly use a wide variety of inversions when comping, rather than only using standard voicings.

In aerospace design a kluge was a temporary design using separate commonly available components that were not flight worthy to proof the design and enable concurrent software development while the integrated components were developed and manufactured.

A wale can split into two or more wales using increases, most commonly involving a yarn over.

Kendo is practiced wearing a traditional Japanese style of clothing, and using one or, less commonly, two.

Then Socrates goes on to demonstrate the contrary of the commonly accepted part using the law of noncontradiction.

Current techniques for site-specific mutation commonly involve using mutagenic oligonucleotides in a primer extension reaction with DNA polymerase.